NEWS: Add NEWS file

[etc/awesome.git] / doc / timetable.md

diff --git a/doc/timetable.md b/doc/timetable.md
index 845c7875ddb0db006566e59d220b0daf7928f151..812da43c711e4ab9b272cdc770e085efeefbbec6 100644 (file)
--- a/doc/timetable.md
+++ b/doc/timetable.md
@@ -1,4 +1,4 @@
-# `luatz.timetable`
+## `luatz.timetable` <!-- --> {#timetable}
 
 Provides an class to represent a time and date.
 Objects have no concept of timezone or utc offset.
@@ -15,47 +15,57 @@ The fields are intentionally compatible with the lua standard library's `os.date
   - `wday` (optional)
   
 timetable components may be outside of their standard range (e.g. a month component of 
-14) to facilitate arithmetic operations on date components. `:normalise ( )` can be 
+14) to facilitate arithmetic operations on date components. `:normalise()` can be 
 called to modify components to return to their standard range.
 
 Equality and comparisons should work between timetable objects.
 
 
-### `new ( year , month , day , hour , min , sec , [yday] , [wday] )`
+### `new(year, month, day, hour, min, sec[, yday[, [wday]])` <!-- --> {#timetable.new}
 
 Returns a new timetable with the given contents.
 
 
-### `new_from_timestamp ( timestamp )`
+### `new_from_timestamp(timestamp)` <!-- --> {#timetable.new_from_timestamp}
 
 Returns a new (normalised) timetable, given a timestamp in seconds since the unix epoch of 
 1970-01-01.
 
 
-### `:clone ( )`
+### `timetable:clone()` <!-- --> {#timetable:clone}
 
 Returns a new independent instance of an existing timetable object.
 
 
-### `:normalise ( )`
+### `timetable:normalise()` <!-- --> {#timetable:normalise}
 
-Mutates the current object's time and date components so that they lie within 'normal' 
+Mutates the current object's time and date components so that are integers within 'normal'
 ranges e.g. `month` is `1`-`12`; `min` is `0`-`59`
 
+First, fractional parts are propagated down.  
+e.g. `.month=6.5` `.day=1` (which could be read as "the first day after the middle of June")
+normalises to `.month=2` `.day=16`
 
-### `:rfc_3339 ( )` and `__tostring` metamethod
+Second, any fields outside of their normal ranges are propagated up  
+e.g. `.hour=10` `.min=100` (100 minutes past 10am)
+normalises to `.hour=11` `.min=40`
+
+
+### `timetable:rfc_3339()` <!-- --> {#timetable:rfc_3339}
 
 Returns the timetable formatted as an rfc-3339 style string.
 The timezone offset (or Z) is not appended.
 The ranges of components are not checked, if you want a valid timestamp,
-`:normalise ( )` should be called first.
+[`:normalise()`](#timetable:normalise) should be called first.
+
+This function is also the `__tostring` metamethod for timetable objects
 
 
-### `:timestamp ( )`
+### `timetable:timestamp()` <!-- --> {#timetable:timestamp}
 
 Returns the timetable as the number of seconds since unix epoch (1970-01-01) as a lua number.
 
 
-### `:unpack ( )`
+### `timetable:unpack()` <!-- --> {#timetable:unpack}
 
 Unpacks the timetable object; returns `year`, `month`, `day`, `hour`, `min`, `sec`, `yday`, `wday`